if i remember correctly small block dist with the point and condenser system would interchange-i believe there was a short and longer shaft dist but that was in the 1950s-that was a cast iron housing version. even an early corvette dual point dist fits- they had a snap on cap (no window or the newer two screw cap with 2 windows). best way to get correct part number for year and motor-then set up timing curve on dist machine if you can find an old sun dist machine
